Ink ribbon cassette



FIG. 1 is a top plan view of an ink ribbon cassette, showing my newdesign;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side end elevational view thereof;

FIG. 5 is a right side end elevational view thereof;

FIG. 6 is a bottom plan view thereof; and

FIG. 7 is a front, top and right side perspective view thereof.

The ornamental design for an ink ribbon cassette, as shown.